{"uid":"cap_umutX09AY0G4oaXaziADD","slug":"openverbs-chain-transaction-explainer-3bd6b5ea","name":"OpenVerbs Chain Transaction Explainer","description":"Decode a transaction into plain language: native ETH transfer, contract call (with decoded method name for common ERC-20/DEX functions like transfer, approve, swap, mint, multicall) or contract creation; ERC-20 and NFT (ERC-721) transfers it triggered (token, from, to, amount/tokenId from logs); gas spent in ETH; success/failed/pending; and a one-line summary. Reads live on-chain data with automatic endpoint fallback.","url":"https://chain.openverbs.com/v1/explain","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","properties":{"hash":{"type":"string","pattern":"^0x[0-9a-fA-F]{64}$","description":"32-byte transaction hash."},"chain":{"enum":["ethereum","base","arbitrum","optimism","polygon"],"type":"string","description":"EVM chain to query. One of: ethereum, base, arbitrum, optimism, polygon. Default \"ethereum\"."}},"additionalProperties":false},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.006","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.006/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1BX9RwMvZsv9dvz1LM9UC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.006","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Decodes an on-chain transaction hash into plain-language summary including transfer type, decoded method, ERC-20/NFT token movements, gas cost, and status","exampleAgentPrompt":"Can you explain what happened in this Ethereum transaction — 0x4e6f6e636500000000000000000000000000000000000000000000000000dead — like what method was called, what tokens moved, how much gas was used, and whether it succeeded?","exampleUseCases":[{"title":"DeFi swap breakdown for user","prompt":"I just did a Uniswap swap on Ethereum and want to know exactly what happened — can you decode transaction 0xabc123...def456 and tell me what tokens were swapped, how much, and what the gas cost was?"},{"title":"NFT mint verification","prompt":"Can you check this Base chain transaction 0xdead...beef and tell me if an NFT was minted, what token ID it got, and whether the transaction actually succeeded?"},{"title":"Suspicious transfer investigation","prompt":"Someone sent me this Polygon transaction hash 0x1234...5678 — can you decode it and tell me in plain English what it did, what contracts or tokens were involved, and whether any ERC-20 tokens moved?"}],"resultDescription":"A plain-language explanation of the transaction including: the type (native ETH transfer, contract call, or contract creation), the decoded method name for common functions (transfer, approve, swap, mint, multicall, etc.), a list of ERC-20 and ERC-721 (NFT) token transfers triggered by the transaction with from/to/amount or tokenId, total gas spent in ETH, transaction status (success/failed/pending), and a concise one-line summary.","failureModes":["Invalid or malformed transaction hash returns validation error","Transaction not found on the specified chain returns not-found error","Unsupported chain name returns enum validation error","Unrecognized contract method may return raw 4-byte selector instead of decoded name","Pending transactions may have incomplete receipt data","Network congestion or RPC fallback delays may increase latency","Microtransaction fee of $0.006 USDC must be paid per call via x402 protocol"],"whenToPreferThis":"Choose this endpoint when you need a human-readable explanation of a specific transaction — especially for DeFi swaps, ERC-20 transfers, NFT mints, or contract calls — across Ethereum, Base, Arbitrum, Optimism, or Polygon. It is ideal when you want decoded method names, token movement details from logs, and a plain-language summary in a single call rather than stitching together raw RPC calls. Prefer sibling endpoints for raw tx data without explanation, or for block/address-level queries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:30:02.211Z","isFirstParty":false}